I have both a UTH and heating lamp, I turn the lamp on and off during the day depending on the internal temp of the tank and I give him enough water (about 1-1 1/2 inches) to maintain humidity, if the air in the tank begins to feel dry, I lightly mist the tank down as to not over-dampen the substrate too much. I don't have a second hiding spot yet but he curls up under the branch when he goes to cool down and as for the cover it's a screen top and I put a thick towel on the cool side as to retain heat and moisture (?) in the tank.